US8949578B2 - Sharing of internal pipeline resources of a network processor with external devices - Google Patents
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- US8949578B2 US8949578B2 US13/568,365 US201213568365A US8949578B2 US 8949578 B2 US8949578 B2 US 8949578B2 US 201213568365 A US201213568365 A US 201213568365A US 8949578 B2 US8949578 B2 US 8949578B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/163—Interprocessor communication
- G06F15/167—Interprocessor communication using a common memory, e.g. mailbox
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
- H04L49/254—Centralised controller, i.e. arbitration or scheduling
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- Network processors are generally used for analyzing and processing packet data for routing and switching packets in a variety of applications, such as network surveillance, video transmission, protocol conversion, voice processing, and internet traffic routing.
- Early types of network processors were based on software-based approaches with general-purpose processors, either singly or in a multicore implementation, but such software-based approaches are slow. Further, increasing the number of general-purpose processors had diminishing performance improvements, or might actually slow down overall Network Processor throughput.
- Newer designs add hardware accelerators to offload certain tasks from the general-purpose processors, such as encryption/decryption, packet data inspections, etc. These newer Network Processor designs are traditionally implemented with either i) a non-pipelined architecture or ii) a fixed pipeline architecture.
- non-pipelined architecture general-purpose processors are responsible (breach action taken by acceleration functions.
- a non-pipelined architecture provides great flexibility in that the general-purpose processors can make decisions on a dynamic, packet-by-packet basis, thus providing data packets only to the accelerators or other processors that are required to process each packet.
- significant software overhead is involved in those cases where multiple accelerator actions might occur in sequence.
- packet data flows through the general-purpose processors and/or accelerators in a fixed sequence regardless of whether a particular processor or accelerator is required to process a given packet.
- Use of this fixed sequence might add significant overhead to packet processing and has limited flexibility to handle new protocols, thereby limiting the advantage provided by using accelerators in an architecture.
- Described embodiments provide a system having at least two network processors that each have a plurality of processing modules.
- the processing modules process a packet in a task pipeline by transmitting task messages to other processing modules on a task ring, the task messages related to desired processing of the packet.
- a series of tasks within a network processor may result in no processing or reduced processing for certain processing modules creating a virtual pipeline depending on the packet received by the network processor.
- At least two of the network processors communicate tasks. This communication allows for the extension of the virtual pipeline of one network processor to at least two network processors.
- FIG. 1 shows a block diagram of a network processor in accordance with exemplary embodiments
- FIG. 2 shows a block diagram of a task ring employed by the network processor of FIG. 1 in accordance with exemplary embodiments
- FIG. 3 shows an exemplary logical diagram of packets flowing through exemplary “virtual pipelines” of the network processor of FIG. 1 ;
- FIG. 4 shows an exemplary block diagram of multiple network processors of FIG. 1 in communication to share resources in accordance with exemplary embodiments
- FIG. 5 shows an exemplary flow diagram of a process of resource sharing of the system of FIG. 4 ;
- FIG. 6 shows an exemplary flow diagram of a source network processor sending a packet for further task processing to one or more destination network processors in the system of FIG. 4 ;
- FIG. 7 shows an exemplary table of data included in a packet sent by the source network processor in the system of FIG. 4 ;
- FIG. 8 shows an exemplary flow diagram showing of how a source network processor inserts data into a packet that the destination network processor extracts to do further task processing on the packet.
- a system having at least two network processors that each have a plurality of processing modules.
- the processing modules process a packet in a task pipeline by transmitting task messages to other processing modules on a task ring for how to process the packet.
- a series of tasks within a network processor may result in no processing or reduced processing for certain processing modules creating a virtual pipeline depending on the packet received by the network processor.
- At least two of the network processors communicate tasks. This communication allows for the extension of the virtual pipeline of one network processor to at least two network processors.
- FIG. 1 shows a block diagram of an exemplary network processor system (network processor 100 ) implemented as a system-on-chip (SoC).
- Network processor 100 might be used for processing data packets, performing protocol conversion, encrypting and decrypting data packets, or the like.
- network processor 100 includes on-chip shared memory 112 , one or more input-output (I/O) interfaces collectively shown as I/O port 104 , one or more microprocessor ( ⁇ P) cores 106 1 - 106 M , and one or more hardware accelerators 108 1 - 108 N , where M and N are integers greater than or equal to 1.
- Network processor 100 also includes external memory interface 114 for communication with external memory 116 .
- External memory 116 might typically be implemented as a dynamic random-access memory (DRAM), such as a double-data-rate three (DDR-3) DRAM, for off-chip storage of data.
- DRAM dynamic random-access memory
- each of the one or more I/O interfaces, ⁇ P cores and hardware accelerators might be coupled through switch 110 to shared memory 112
- Switch 110 might be implemented as a non-blocking crossbar switch such as described in related U.S. patent application Ser. No. 12/430,438 filed Apr. 27, 2009, Ser. No. 12/729,226 filed Mar. 22, 2010, and Ser. No. 12/729,231 filed Mar. 22, 2010, which are incorporated by reference herein.
- I/O port 104 might typically be implemented as hardware that connects network processor 100 to one or more external devices through I/O communication link 102 .
- I/O communication link 102 might generally be employed for communication with one or more external devices, such as a computer system or networking device, which interfaces with network processor 100 .
- I/O communication link 102 might be a custom-designed communication link, or might conform to a standard communication protocol such as, for example, a Small Computer System Interface (“SCSI”) protocol bus, a Serial Attached SCSI (“SAS”) protocol bus, a Serial Advanced Technology Attachment (“SATA”) protocol bus, a Universal Serial Bus (“USB”), an Ethernet link, an IEEE 802.11 link, an IEEE 802.15 link, an IEEE 802.16 link, a Peripheral Component Interconnect Express (“PCI-E”) link, a Serial Rapid I/O (“SRIO”) link, or any other interlace link.
- Received packets are preferably placed in a buffer in shared memory 112 by transfer between I/O port 104 and shared memory 112 through switch 110 .
- shared memory 112 is a conventional memory operating as a cache that might be allocated and/or subdivided.
- shared memory 112 might include one or more FIFO queues that might be dynamically allocated to the various ⁇ P cores 106 and hardware accelerators 108 .
- External memory interface 114 couples shared memory 112 to one or more external memories, shown as external memory 116 , to provide off-chip storage of data not currently in use by the various ⁇ P cores 106 and hardware accelerators 108 to free space in shared memory 112 .
- shared memory 112 and external memory 116 might generally be referred to as system memory 120 .
- Hardware accelerators 108 might interact with each other, for example, by one or more communication (e.g., bus) rings 118 that pass “tasks” from a source core to a destination core.
- tasks are instructions to the destination core to perform certain functions, and a task might contain address pointers to data stored in shared memory 112 , as described in related U.S. patent application Ser. Nos. 12/782,379, 12/782,393, and 12/782,411, all filed May 18, 2010, the teachings of which are incorporated in their entireties by reference herein.
- Network processor 100 might typically receive data packets from one or more source devices, perform processing operations for the received data packets, and transmit data packets out to one or more destination devices. As shown in FIG. 1 , one or more data packets are transmitted from a transmitting device (not shown) to network processor 100 , via communications link 102 . Network processor 100 might receive data packets from one or more active data streams concurrently from communications link 102 . I/O port 104 might parse the received data packet and provide the received data packet, via switch 110 , to a buffer in shared memory 112 .
- I/O port 104 provides various types of I/O interface functions and, in exemplary embodiments described herein, is a command-driven hardware accelerator that connects network processor 100 to external devices. Received packets are preferably placed in shared memory 112 and then one or more corresponding tasks are generated. Transmitted packets are preferably generated from data in shared memory 112 for one or more corresponding tasks and might be transmitted out of network processor 100 .
- Exemplary I/O interfaces include Ethernet 110 adapters providing integrity checks of incoming data. The I/O interfaces might also provide timestamp data for received and transmitted packets that might be used to implement features such as timing over packet (e.g., specified in the standard recommendations of IEEE 1588).
- I/O port 104 might be implemented as input (receive) only or output (transmit) only interfaces.
- the sequence of processing of the tasks depends on i) the type of packet and ii) the type of processing performed by the various cores on a particular packet (or group of packets), control message, or other data.
- This is referred to herein as a “Virtual PipelineTM”, a trademark of LSI Corporation, of Milpitas, Calif.
- each of a plurality of virtual pipelines operate by each processing module of network processor 100 receiving a task, executing that task, and assigning a subsequent task to another (or the same) processing module depending on an identification of a virtual pipeline corresponding to the task.
- tasks are instructions to the destination core to perform certain functions, and a task might be passed substantially as described in related U.S. patent application Ser. Nos. 12/782,379, 12/782,393, and 12/782,411, all filed May 18, 2010, the teachings of which are incorporated in their entireties by reference herein.
- the various ⁇ P cores 106 and hardware accelerators 108 of network processor 100 might include several exemplary types of processors or accelerators.
- the various ⁇ P cores 106 might be implemented as Pentium®, Power PC® or ARM processors or a combination of different processor types (Pentium® is a registered trademark of Intel Corporation, ARM processors are by ARM Holdings, plc, and Power PC® is a registered trademark of IBM).
- the various hardware accelerators 108 might include, for example, one or more function-specific modules, such as a Modular Packet Processor (MPP), a Packet Assembly Block (PAB), a Modular Traffic Manager (MTM), a Memory Management Block (MMB), a Stream Editor (SED), a Security Protocol Processor (SPP), a Regular Expression (RegEx) engine, and other special-purpose modules.
- MPP Modular Packet Processor
- PAB Packet Assembly Block
- MTM Modular Traffic Manager
- MMB Memory Management Block
- SED Security Protocol Processor
- Regular Expression (RegEx) engine a Regular Expression engine
- the MTM a software-driven accelerator that provides packet scheduling and possibly up to six levels of scheduling hierarchy.
- the MTM might support millions of queues and schedulers (enabling per flow queuing if desired).
- the MTM might provide support for shaping and scheduling with smooth deficit weighed round robin (SDWRR) for every queue and scheduler.
- SDWRR smooth deficit weighed round robin
- the MTM might also support multicasting. Each copy of a packet is scheduled independently and traverses down one or more virtual pipelines enabling multicast with independent encapsulations or any other processing.
- the MTM also contain a special purpose processor that can be used for fine-grained control of scheduling decisions.
- the MTM might be used to make discard decisions as well as scheduling and shaping decisions.
- the MTM might operate substantially as described in related U.S.
- the SED is a software-driven accelerator that allows for editing of packets.
- the SED performs packet editing functions that might include adding and modifying packet headers as well as fragmenting or segmenting data (e.g., IP fragmentation).
- the SED receives packet data as well as parameters from tasks and a task specified per-flow state.
- the output of the SED can become the outgoing packet data and can also update task parameters.
- the RegEx engine is a packet search engine for state-based cross-packet pattern matching.
- the RegEx engine is multi-threaded accelerator.
- An exemplary RegEx engine might be implemented such as described in U.S. Pat. No. 7,430,652 to Hundley, U.S. Pat. No. 7,899,904 to Ruehle and U.S. Pat. No. 7,512,592 to Lemoine, the teachings of which are incorporated in their entireties by reference herein.
- the SPP provides encryption/decryption capabilities and is a command-driven hardware accelerator, preferably having the flexibility to handle protocol variability and changing standards with the ability to add security protocols with firmware upgrades.
- the ciphers and integrity (hash) functions might be implemented in hardware.
- the SPP has a multiple ordered task queue mechanism, discussed in more detail below, that is employed for load balancing across the threads.
- the MMB allocates and frees memory resources in shared memory 112 .
- Memory is allocated for such applications as task FIFO storage, packet data storage, hash-table collision handling, timer event management, and traffic manager queues.
- the MMB provides reference counts to each block of memory within shared memory 112 . Multiple reference counts allow for more efficient storage of information, such as multicast traffic (data to be sent to multiple destinations) or for retransmission. Multiple reference counts remove a need for replicating data each time the data is needed.
- the MMB preferably tracks the memory allocations using a stack-based approach since a memory block recently released is preferably the next block to be allocated for a particular task, reducing cache thrashing and cache tracking overhead.
- Blocks in shared memory 112 might be dynamically allocated by the MMB to store data, with the blocks in one of the following sizes: 256, 2048, 16384, and 65536 bytes.
- the MMB might operate substantially as described in related U.S. patent application Ser. No. 12/963,895 filed Dec. 9, 2010 and Ser. No. 13/359,690 filed Jan. 27, 2012, the teachings of which are incorporated in their entireties by reference herein.
- the PAB is a command driven hardware aceelerator providing a holding buffer with packet assembly, transmit, retransmit, and delete capabilities.
- An incoming task to the PAB can specify to insert/extract data from anywhere in any assembly buffer. Gaps are supported in any buffer. Locations to insert and extract can be specified to the bit level. Exemplary traditional packet reassembly functions might be supported, such as IP defragmentation.
- the PAB might also support generalized holding buffer and sliding window protocol transmit/retransmit buffering, providing an offload for features like TCP origination, termination, and normalization.
- the PAB might operate substantially as described in related U.S.
- the MPP is a multi-threaded special purpose processor that provides tree based longest prefix and access control list classification.
- the MPP also has a hardware hash-based classification capability with full hardware management of hash-table additions, deletions, and collisions.
- Optionally associated with each hash entry is a timer that might be used under software control for tasks such as connection timeout and retransmission timing.
- the MPP contains a statistics and state management engine, which when combined with the hash table and timer facilities, provides support for state-based protocol processing.
- the MPP might support millions of flows, limited only by the amount of DRAM capacity assigned to the functions.
- the MPP architecture might be able to store all per thread states in memory instead of in register files.
- the MPP might operate substantially as described in related U.S.
- network processor 100 processes data and control messages more efficiently than a fixed pipeline or non-pipelined architecture.
- the “virtual pipeline” of network processor 100 employs metadata associated with the packet to determine the order of processing by corresponding, ones of cores 106 and hardware accelerators 108 .
- FIG. 2 shows a block diagram of an embodiment of network processor 100 .
- packets are received by a first I/O port 104 1 , which parses the received packet and generates one or more tasks corresponding to the received packet.
- the tasks are sent on task ring 118 1 to corresponding ⁇ P cores 106 and hardware accelerators 108 .
- the corresponding ⁇ P cores 106 and hardware accelerators 108 process packet data based on the tasks, and provide corresponding tasks to a second I/O port 104 2 .
- Second I/O port 104 2 generates an output packet corresponding to the received and processed tasks, and provides the output pocket(s) to I/O communication link(s) 102 .
- FIG. 3 shows an exemplary packet flow of two exemplary virtual pipelines of network processor 100 .
- FIG. 3 shows a first virtual pipeline sequence 320 for processing an exemplary packet, and as second virtual pipeline sequence 322 for processing another exemplary packet.
- virtual pipeline 320 defines a processing order starting at I/O port 104 1 , proceeding through hardware accelerator 108 1 , hardware accelerator 108 3 , ⁇ P core 106 1 , hardware accelerator 108 2 , and finishing, at I/O port 104 2 .
- another packet received by the first I/O port 104 1 might be processed in accordance with second virtual pipeline 322 .
- FIG. 3 shows a packet flow of two exemplary virtual pipelines of network processor 100 .
- FIG. 3 shows a first virtual pipeline sequence 320 for processing an exemplary packet, and as second virtual pipeline sequence 322 for processing another exemplary packet.
- virtual pipeline 320 defines a processing order starting at I/O port 104 1 , proceeding through hardware accelerator 108 1 , hardware accelerator 108 3 , ⁇ P
- virtual pipeline 322 also defines as processing order starting at I/O port 104 1 and proceeding through hardware accelerator 108 1 but then proceeding to hardware accelerator 108 4 and then finishing at I/O port 104 2 .
- Processor core 106 1 and hardware accelerator cores 108 2 and 108 3 are not included in virtual pipeline 322 .
- hardware accelerator care 108 1 might be a packet classifier (e.g., the MPP) that parses incoming packet and determines what virtual pipeline tasks are to follow for a given packet.
- Hardware accelerator core 108 2 might be a scheduler (e.g., the MTM) that transmits outgoing packets according to configured schedule parameters.
- Hardware accelerator core 108 3 might be a decryption engine (e.g. the SPP) that decrypts packet prior to sending it to processor core 106 1 .
- Hardware accelerator core 108 4 might be a packet data modifier (e.g., the SED) that updates packet data before sending it out via I/O Port 104 2 .
- network processor 100 might share resources such as the various ⁇ P cores 106 and hardware accelerators 108 between multiple network processors, such as shown in FIG. 4 .
- FIG. 4 shows a block diagram of described embodiments that connects multiple network processors 100 1 and 100 2 into a single logical system 400 .
- System 400 enables virtual pipeline 402 of network processor 100 1 to be extended to and shared by one or more additional network processors (e.g., network processor 100 3 ). For example, a packet might arrive at network processor 100 1 at I/O port 104 1 and, be partially processed by virtual pipeline 402 .
- the partially processed packet and a task message might be sent out of network processor 100 3 through I/O port 104 2 to network processor 100 2 arriving I/O port 104 3 .
- the packet and task message might be sent through optional external switch 422 before arriving at network processor 100 2 .
- Virtual pipeline 404 of network processor 100 2 processes the partially processed packet and task message received from network processor 100 1 .
- the packet could be sent out of network processor 100 2 through I/O port 104 4 to another destination which may perform additional processing if an additional task message is also sent.
- Task messages may be sent separately from the packet or task messages may be inserted as data within the packet. Described embodiments may insert data in the packet before it is sent from first network processor 100 1 and extract that data by subsequent network processor 100 2 for use as task parameters to enable sharing between virtual pipelines 402 and 404 . This reduces the need for classification of the packet in the subsequent network processor 100 2 .
- FIG. 4 Although shown in FIG. 4 as only having two network processors, any number of subsequent network processors might be coupled together. The ability to couple multiple network processors 100 and share virtual pipelines between them allows processing to be split between two or more network processors 100 . For example, the first network processor 100 1 might classify the packet and the second network processor 100 2 might schedule the packet. For packets flowing in the opposite direction, the roles of the network processors 100 might be reversed, in essence allowing for double the bandwidth of a single network processor.
- FIG. 5 shows a flow diagram of process 500 for sharing tasks between network processors 100 1 and 100 2 . Steps occurring within network processor 100 1 are shown as occurring within dashed line 530 . Steps occurring within the network processor 100 2 are shown as occurring, within dashed line 532 .
- a packet is received by network processor 100 1 , and the packet data might be operated on by various processing modules (e.g., 106 or 108 ) corresponding to a given virtual pipeline of network processor 100 1 .
- network processor 100 1 determines whether the packet should be sent to a network processor 100 2 for further processing.
- one or more tasks corresponding to the packet might be provided to virtual pipeline 404 of network processor 100 2 to complete processing of the packet, if, at step 504 , source network processor 100 1 determines that the packet does not require another network processor to complete processing, then task processing for the packet is completed by network processor 100 1 at stop 506 . Processing of the packet might complete at step 520 , for example, by sending the processed packet as an output packet of network processor 100 1 .
- network processor 100 1 determines that the packet should be seat to network processor 100 2 . If, at step 504 , network processor 100 1 determines that the packet should be seat to network processor 100 2 , then, at step 508 , network processor 100 1 adds data to (or otherwise augments with data) the packet, for example, by inserting data into an existing packet. At step 510 , network processor 100 1 sends the packet to network processor 100 2 . The inserted data is used by network processor 100 2 as instructions for further task processing. At step 512 , network processor 100 2 receives the packet with the inserted data. At step 514 , network processor 100 2 extracts the inserted data. At step 516 , network processor 100 2 processes the packet using the task instructions from the extracted data, and the task processing for the packet completes at step 520 .
- FIG. 6 shows a flow diagram of process 600 for sharing tasks between source network processors 100 s and destination network processors 100 d . Steps occurring within source network processor 100 d are shown as occurring within dashed line 630 . Steps occurring within destination network processor 100 d are shown as occurring within dashed line 632 . Process 600 is a variation of process 500 . Process 600 provides a loop for allowing each destination processor 100 d to send received packets to other destination processors.
- a packet is received by source network processor 100 s , and the packet data might be operated on by various processing modules (e.g., 106 or 108 ) corresponding to a given virtual pipeline of source network processor 100 s .
- source network processor 100 s determines whether the packet should be sent to a destination network processor 100 d for further processing.
- source network processor 100 s determines that the packet does not require another network processor to complete processing, then task processing for the packet is completed by source network processor 100 s at step 606 . Processing of the packet might complete at step 620 , for example, by sending the processed packet as an output packet of source network processor 100 s . If, at step 604 , source network processor 100 s determines that the packet should be sent to a destination network processor 100 d , then, at step 608 , source network processor 100 s inserts data into (or otherwise augments with data) the packet. At step 610 , source network processor 100 s sends the packet to destination network processor 100 d . The inserted data is used by destination network processor 100 d as instructions for further task processing.
- destination network processor 100 d receives the packet with the inserted data.
- destination network processor 100 d extracts the inserted data.
- destination network processor 100 d processes the packet using the task instructions from the extracted data.
- destination network processor 100 d acts as a source network processor.
- process 600 returns to step 604 , where, a source network processor determines whether to complete the processing or to send the packet to another destination processor for further processing.
- a source network processor determines to complete processing
- process 600 proceeds to step 606 where the remaining tasks are completed, and the processing of the packet completes at step 620 . Processing of the packet completes at step 620 , for example, by sending the processed packet as an output packet of source network processor 100 s .
- Insertion of data by source network processor 100 s might use a user-defined Ethertype, allowing the port to receive both VPE (virtual pipeline extension) packets and packets from the outside world.
- VPE virtual pipeline extension
- standard Ethernet switches e.g., 422 of FIG. 4
- the ability to “stack” up an arbitrary number of network processors using switches or ports increases the processing bandwidth to an arbitrary size.
- FIG. 7 shows exemplary table 700 showing exemplary data that source network processor 100 , might insert into an Ethernet packet before sending the packet to destination network processor 100 d .
- packet data might typically include header data such as a destination MAC address 702 , a source MAC address 704 and the remainder of the Ethernet frame 712 .
- Source network processor 100 s might typically insert or modify data such as Ethertype data 706 .
- Destination network processor 100 d detects the inserted Ethertype data 706 , and based on the detected Ethertype data, extracts other inserted data, such as Virtual Flow ID 708 , which is used to identify the virtual pipeline for the packet, and task parameters 710 , which might be used by destination network processor 100 d to determine task processing of the packet.
- Virtual Flow ID 708 which is used to identify the virtual pipeline for the packet
- task parameters 710 which might be used by destination network processor 100 d to determine task processing of the packet.
- source network processor 100 s might insert 16 bytes of data starting at byte 12 of a packet.
- source network processor 100 s might insert 2 bytes of Ethertype data 706 , 1 byte of Virtual Flow ID 708 for destination network processor 100 d , and 13 bytes of task parameters 710 .
- Destination network processor 100 d might extract these same 16 bytes when receiving a packet containing them in order to process the received packet.
- such a virtual pipeline extension frame might be coquetted to destination network processor 100 d with bytes 12:27 removed from packet data such that queued packets do not store the encapsulated data and, thus, queued packet data is shortened by 16 bytes relative to the length of the received packet.
- encapsulated data might be sent between multiple network processors as inline data without requiring a dedicated channel.
- FIG. 8 shows a flow diagram of process 800 for source network processor 100 s and destination network processor 100 d to communicate the data inserted by the source network processor as described in regard to FIG. 5 and FIG. 6 .
- source network processor 100 s processes a packet and sends the packet to destination network processor 100 d (e.g., as described for steps 504 - 510 of FIG. 5 and steps 604 - 610 of FIG. 6 ).
- 16 bytes are inserted in the packet as described in regard to HU 7 .
- the 16 inserted bytes include, but are not limited to, 2 bytes of Ethertype, 1 byte of virtual flow ID and 13 bytes of task parameters.
- the insertion of data could be done using, either software running on one of ⁇ P cares 106 or by a dedicated hardware accelerator 108 (such as the SED engine described herein).
- the packet is then sent to destination network processor 100 d at step 806 .
- Destination network processor 100 d receives the packet at step 820 and parses the user defined Ethertype. Destination network processor 100 d will not extract data unless extraction is enabled. If, at step 820 , inserted Ethertype data is DOT detected or extraction is not enabled, then destination network processor 100 d continues normal processing of the received packet at step 822 .
- the destination network processor 100 d detects the inserted Ethertype data and extraction is enabled, then the 16 bytes of inserted data are extracted from the packet at step 824 .
- the extracted data forms a task that is then processed by the ⁇ P cores 106 and hardware accelerators 108 of destination network processor 100 d based on the corresponding virtual pipeline defined by the virtual flow ID.
- embodiments provide a system having at least two network processors that each have a plurality of processing modules.
- the processing modules process a packet in a task pipeline by transmitting task messages to other processing modules on a task ring for how to process the packet.
- a series of tasks within a network processor may result in no processing or reduced processing for certain processing modules creating a virtual pipeline depending an the packet received by the network processor.
- At least two of the network processors communicate tasks.
- the determination, by a source network processor, on whether to pass a task to a destination network processor could be made by application software running inside the source network processor. This communication allows for the logical extension of the virtual pipeline of one network processor to at least two network processors.
- the present invention can be embodied in the form of methods and apparatuses for practicing those methods.
- the present invention can also be embodied in the form of program code embodied in tangible media, such as magnetic recording media, optical recording media, solid state memory, floppy diskettes, CD-ROMs, hard drives, or any other non-transitory machine-readable storage medium, wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the invention.
- the present invention can also be embodied in the thrill of program code, for example, whether stored in a non-transitory machine-readable storage medium, loaded into and/or executed by a machine, or transmitted over some transmission medium or carrier, such as over electrical wiring or cabling, through fiber optics, or via electromagnetic radiation, wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the invention.
- the program code segments combine with the processor to provide a unique device that operates analogously to specific logic circuits.
- the present invention can also be embodied in the form of bitstream or other sequence of signal values electrically or optically transmitted through a medium, stored magnetic-field variations in a magnetic recording medium, etc., generated using a method and/or an apparatus of the present invention.
- the term “compatible” means that the element communicates with other elements in a manner wholly or partially specified by the standard, and would be recognized by other elements as sufficiently capable of communicating with the other elements in the manner specified by the standard.
- the compatible element does not need to operate internally in a manner specified by the standard.
- Couple refers to any manner known in the art or later developed in which energy is allowed to be transferred between two or more elements, and the interposition of one or more additional elements is contemplated, although not required.
- the terms “directly coupled,” “directly connected,” etc. imply the absence of such additional elements. Signals and corresponding nodes or ports might be referred to by the same name and are interchangeable for purposes here.
Abstract
Description
TABLE 1 | |||
USB | Universal Serial Bus | FIFO | First-In, First-Out |
SATA | Serial Advanced | I/O | Input/Output |
Technology Attachment | |||
SCSI | Small Computer System | DDR | Double Data Rate |
Interface | |||
SAS | Serial Attached SCSI | DRAM | Dynamic Random Access |
Memory | |||
PCI-E | Peripheral Component | MPLS | Multi-Protocol Label |
Interconnect Express | Switching | ||
SRIO | Serial RapidIO | CRC | Cyclic Redundancy Check |
SoC | System-on-Chip | μP | Microprocessor |
MMB | Memory Manager Block | MPP | Modular Packet Processor |
PAB | Packet Assembly Block | MTM | Modular Traffic Manager |
SPP | Security Protocol | SED | Stream Editor |
Processor | |||
VLAN | Virtual Local Area | OSI | Open Systems |
Network | Interconnection | ||
UDP | User Datagram Protocol | ACL | Access Control List |
TCP | Transmission Control | IP | Internet Protocol |
Protocol | |||
Claims (20)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/568,365 US8949578B2 (en) | 2009-04-27 | 2012-08-07 | Sharing of internal pipeline resources of a network processor with external devices |
US13/687,958 US9461930B2 (en) | 2009-04-27 | 2012-11-28 | Modifying data streams without reordering in a multi-thread, multi-flow network processor |
US13/705,822 US9727508B2 (en) | 2009-04-27 | 2012-12-05 | Address learning and aging for network bridging in a network processor |
US13/756,849 US9444737B2 (en) | 2009-04-27 | 2013-02-01 | Packet data processor in a communications processor architecture |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/430,438 US8352669B2 (en) | 2009-04-27 | 2009-04-27 | Buffered crossbar switch system |
US12/782,411 US8407707B2 (en) | 2009-05-18 | 2010-05-18 | Task queuing in a network communications processor architecture |
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US13/568,365 US8949578B2 (en) | 2009-04-27 | 2012-08-07 | Sharing of internal pipeline resources of a network processor with external devices |
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